Rapid response to the M w 4.9 earthquake of November 11, 2019 in Le Teil, Lower Rhône Valley, France
Year: 2021
Type: article
Abstract: On November 11, 2019, a Mw 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on the eastern margin of the Massif Central close to the external part of the Alps. Occuring in a moderate seismicity area, this earthquake is remarkable for its very shallow focal depth (between 1 and 3 km), its magnitude, and the moderate to large damages it produced in several villages. InSAR interferograms indicated a shallow rupture about 4 km long reaching the surface and the reactivation of the ancient NE-SW La Rouviere normal fault in reverse faulting in agreement with the present-day E-W compressional tectonics. The peculiarity of this earthquake together with a poor coverage of the epicentral region by permanent seismological and geodetic stations triggered the mobilisation of the French post-seismic unit and the broad French scientific community from various institutions, with the deployment of geophysical instruments (seismological and geodesic stations), geological field surveys, and field evaluation of the intensity of the earthquake. Within 7 days after the mainshock, 47 seismological stations were deployed in the epicentral area to improve the Le Teil aftershocks locations relative to the French permanent seismological network (RESIF), monitor the temporal and spatial evolution of microearthquakes close to the fault plane and temporal evolution of the seismic response of 3 damaged historical buildings, and to study suspected site effects and their influence in the distribution of seismic damage. This seismological dataset, completed by data owned by different institutions, was integrated in a homogeneous archive and distributed through FDSN web services by the RESIF data center. This dataset, together with observations of surface rupture evidences, geologic, geodetic and satellite data, will help to unravel the causes and rupture mechanism of this earthquake, and contribute to account in seismic hazard assessment for earthquakes along the major regional Cévenne fault system in a context of present-day compressional tectonics.
Source: Comptes Rendus Géoscience
DOI: 10.5802/crgeos.30
Authors: Cécile Cornou, Jean-Paul Ampuero, Coralie aubert, Laurence Audin, Stéphane Baize, Jérémy Billant, Florent Brenguier, Mathieu Causse, Mohamed Chlieh, Andy Combey, Marcello de Michele, Bertrand Delouis, Anne Deschamps, Matthieu Ferry, Michael Foumelis, Bérénice Froment, Céline Gélis, Raphaël Grandin, jean-robert grasso, Estelle Hannouz, Sébastien Hok, Axel Jung, Romain Jolivet, Mickaël Langlais, Philippe Langlaude, Christophe Larroque, Philippe Hervé Leloup, Kevin Manchuel, Léo Marconato, Christophe Maron, Emmanuel Mathot, Emeline Maufroy, Diego Mercerat, Marianne Métois, Emmanuelle Neyman, Ildut Pondaven, Ludmila Provost, Julie Régnier, Jean-François Ritz, Diane Rivet, Antoine Schlupp, Anthony Sladen, Christophe Voisin, Andrea Walpersdorf, David Wolynieck, Pascal Allemand, Elise Beck, Etienne Bertrand, Véronique Bertrand, Pierre Briole, Didier Brunel, Olivier Cavalié, Jérôme Chèze, Françoise Courboulex, Isabelle Douste-Bacqué, Rémi Dretzen, Tiziano Giampietro, Maxime Godano, Philippe Grandjean, Marc Grunberg, Gauthier Guérin, Stéphane Guillot, Elias el Haber, Alain Hernandez, Hervé Jomard, Cécile Lasserre, Chao Liang, Itzhak Lior, Xavier Martin, Daniel Mata, Marine Ménager, Antoine Mercier, Aurélien Mordret, Elif Oral, Anne Paul, Fabrice Peix, Catherine Péquégnat, Michel Pernoud, Claudio Satriano, Rihab Sassi, Marc Schaming, Valérie Sellier, Christophe Sira, Anne Socquet, Christian Sue, Aurélie Trilla, Martin Vallée, Martijn van den Ende, Philippe Vernant, Benjamin Vial, Huihui Weng
Institutions: Institut des Sciences de la Terre, Université Savoie Mont Blanc, Géoazur, Centre National de la Recherche Scientifique, Institut de Recherche pour le Développement, Institut de Radioprotection et de Sûreté Nucléaire, Université Côte d'Azur, Observatoire de la Côte d’Azur, Bureau de Recherches Géologiques et Minières, Géosciences Montpellier, Institut de physique du globe de Paris, Université Paris Cité, Lyon 1 Université, École Normale Supérieure de Lyon, École Normale Supérieure - PSL, Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Laboratoire de Géologie de l’École Normale Supérieure, Université Jean Monnet, Centre d'Études et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement, Électricité de France (France), Terradue (Italy), École & Observatoire des Sciences de la Terre, Université de Strasbourg, Laboratoire Pacte, Université Grenoble Alpes, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, CEA DAM Île-de-France, CEA Cadarache, Laboratoire Chrono-Environnement, Université Bourgogne Franche-Comté
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: diamond
Funders: Strong, European Space Agency, European Commission, Agence Nationale de la Recherche, Centre National d’Etudes Spatiales, Ministère de l'Écologie, du Développement Durable et de l'Énergie, Ministère de l'Education Nationale, de l'Enseignement Superieur et de la Recherche, Institut de Radioprotection et de SÛreté Nucléaire, Bureau de Recherches Géologiques et Minières
OpenAlex ID: W3145517301